Heathkit IG-18 - Page 35

Detail 158
INSIDE O(
CHASSIS
( ) Mount the 2-lug terminal strip under the
#6 hardware at location Y. See Detail 15B.
Use a #6 solder lug under the terminal
strip mounting foot, and a #6 lockwasher
under the nut. Position the terminal strip
and solder lug as shown in Pictorial 15.
Fasten the front panel assembly to the chas-
sis assembly with the Sine Wave Amplitude
switch (#63-485) at location L. Use control
hardware. Position the switch as shown.
Tighten
the nut only finger tight at this
time.
( ) Likewise, install the Square Wave Amplitude
switch (#63-486) at location M with control
hardware. Position the switch as shown.
Now tighten the control nuts at location L
and M.
Refer to Pictorial 16 (fold-out from Page 26)
for the following steps.
( ) Fasten a side rail to the left end of the
chassis with two 6-32 x 3/8" screws, two
#6
lockwashers, and two 6-32 nuts.
( ) Refer to Detail 16A and, with diagonal
cutters, cut the 7 -lug terminal strip as
shown.
Page 29
Detail 16A
( ) Likewise, fasten a side rail to the right end
of
the chassis with a 3-1ug terminal strip at
Z. Use two 6-32 x 3/8" screws, three #6
lockwashers, and two 6- 32 nuts. Notice that
a #6 lockwasher is used on both sides of the
terminal strip mounting foot. Position the
terminal strip as shown.
Mount
the bezel over the front panel. Fit the
bezel side flanges into the space between the
front panel flanges and the side rails. Secure
the bezel with two 6-32 x 5/8" screws
through each side rail. Thread the screws
into the press-nuts in the front panel flanges.
( )
Fasten one side rail to the rear panel with
two 6-32 x
3/8" screws.
( ) Likewise, fasten the other side rail to the
rear panel with 6-32 x 3/8" screws.
( ) Install the four 6-32 x 7/16" spacer studs
through the side rails and into the front and
rear panel flanges.
( ) Remove the tape from the ends of a handle.
Position . the handle over the two spacer
studs on one end of the instrument. Secure
the handle in place with two end caps and
two 6-32
decorative head screws.
( ) In the same way, mount the handle, end caps,
and decorative head screws on the other end
of
the instrument.